diff --git a/components/datetime/src/pattern/parser.rs b/components/datetime/src/pattern/parser.rs
index cee769477d7..c9b7edd18c3 100644
--- a/components/datetime/src/pattern/parser.rs
+++ b/components/datetime/src/pattern/parser.rs
@@ -144,7 +144,7 @@ impl<'p> Parser<'p> {
 
     pub fn parse_placeholders(
         mut self,
-        mut replacements: Vec<Pattern>,
+        replacements: Vec<Pattern>,
     ) -> Result<Vec<PatternItem>, Error> {
         let mut chars = self.source.chars().peekable();
         let mut result = vec![];
@@ -157,7 +157,7 @@ impl<'p> Parser<'p> {
                     let ch = chars.next().ok_or(Error::UnclosedPlaceholder)?;
                     let idx: u32 = ch.to_digit(10).ok_or(Error::UnknownSubstitution(ch))?;
                     let replacement = replacements
-                        .get_mut(idx as usize)
+                        .get(idx as usize)
                         .ok_or(Error::UnknownSubstitution(ch))?;
                     result.extend_from_slice(replacement.items());
                     let ch = chars.next().ok_or(Error::UnclosedPlaceholder)?;
diff --git a/components/datetime/tests/datetime.rs b/components/datetime/tests/datetime.rs
index 038e1897092..2849dc4bb48 100644
--- a/components/datetime/tests/datetime.rs
+++ b/components/datetime/tests/datetime.rs
@@ -358,8 +358,8 @@ fn test_components_width_differences() {
 /// Tests that component::Bags can combine a date skeleton, and a time skeleton.
 #[test]
 fn test_components_combine_datetime() {
-    // components/datetime/tests/fixtures/tests/components-combine-date-time.json
-    test_fixture("components-combine-date-time");
+    // components/datetime/tests/fixtures/tests/components-combine-datetime.json
+    test_fixture("components-combine-datetime");
 }
 
 #[test]
diff --git a/components/datetime/tests/fixtures/tests/components-combine-date-time.json b/components/datetime/tests/fixtures/tests/components-combine-date-time.json
deleted file mode 100644
index 5b50596b52e..00000000000
--- a/components/datetime/tests/fixtures/tests/components-combine-date-time.json
+++ /dev/null
@@ -1,46 +0,0 @@
-[
-    {
-        "description": "Combine date and time: yMMMd + Ehm",
-        "input": {
-            "locale": "en",
-            "value": "2020-01-07T08:25:07.000",
-            "options": {
-                "components": {
-                    "year": "numeric",
-                    "month": "short",
-                    "day": "numeric",
-
-                    "weekday": "short",
-                    "hour": "numeric",
-                    "minute": "numeric",
-                    "preferences": { "hourCycle": "h12" }
-                }
-            }
-        },
-        "output": {
-            "value": "Tue, Jan 7, 2020, 8:25 AM"
-        }
-    },
-    {
-        "description": "Combine date and time with a \"full\" length glue pattern",
-        "input": {
-            "locale": "en",
-            "value": "2020-01-07T08:25:07.000",
-            "options": {
-                "components": {
-                    "year": "numeric",
-                    "month": "long",
-                    "day": "numeric",
-
-                    "weekday": "long",
-                    "hour": "numeric",
-                    "minute": "numeric",
-                    "preferences": { "hourCycle": "h12" }
-                }
-            }
-        },
-        "output": {
-            "value": "Tuesday, January 7, 2020 at 8:25 AM"
-        }
-    }
-]
diff --git a/components/datetime/tests/fixtures/tests/components-combine-datetime.json b/components/datetime/tests/fixtures/tests/components-combine-datetime.json
index fc9fcffbb13..5b50596b52e 100644
--- a/components/datetime/tests/fixtures/tests/components-combine-datetime.json
+++ b/components/datetime/tests/fixtures/tests/components-combine-datetime.json
@@ -40,7 +40,7 @@
             }
         },
         "output": {
-            "value": "Tue, Jan 7, 2020 at 8:25 AM"
+            "value": "Tuesday, January 7, 2020 at 8:25 AM"
         }
     }
 ]
diff --git a/provider/cldr/src/transform/dates/patterns.rs b/provider/cldr/src/transform/dates/patterns.rs
index 6367d3e47b6..c4796648c77 100644
--- a/provider/cldr/src/transform/dates/patterns.rs
+++ b/provider/cldr/src/transform/dates/patterns.rs
@@ -273,7 +273,7 @@ impl From<&cldr_json::Dates> for gregory::DatePatternsV1 {
             time_h11_h12,
             time_h23_h24,
             preferred_hour_cycle,
-            datetime: (&other.calendars.gregorian.datetime_formats).into(),
+            datetime: date_time_formats_v1,
         }
     }
 }
@@ -327,3 +327,32 @@ fn test_with_numbering_system() {
     // TODO(#308): Support numbering system variations. We currently throw them away.
     assert_eq!("d/M/yy", cs_dates.get().date.short);
 }
+
+#[test]
+fn test_datetime_skeletons() {
+    use gregory::patterns::{PatternV1, SkeletonV1};
+    use icu_locid_macros::langid;
+
+    let cldr_paths = crate::cldr_paths::for_test();
+    let provider = DatePatternsProvider::try_from(&cldr_paths as &dyn CldrPaths).unwrap();
+
+    let cs_dates: DataPayload<gregory::DatePatternsV1Marker> = provider
+        .load_payload(&DataRequest {
+            resource_path: ResourcePath {
+                key: key::GREGORY_DATE_PATTERNS_V1,
+                options: ResourceOptions {
+                    variant: None,
+                    langid: Some(langid!("haw")),
+                },
+            },
+        })
+        .unwrap()
+        .take_payload()
+        .unwrap();
+    let skeletons = &cs_dates.get().datetime.skeletons.0;
+
+    assert_eq!(
+        Some(&PatternV1::try_from("L").expect("Failed to create pattern")),
+        skeletons.get(&SkeletonV1::try_from("M").expect("Failed to create Skeleton"))
+    );
+}